78270267870 has 32 divisors (see below), whose sum is σ = 208720715040. Its totient is φ = 20872071360.

The previous prime is 78270267863. The next prime is 78270267893. The reversal of 78270267870 is 7876207287.

It is a happy number.

It is a super-2 number, since 2×78270267870² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144944671 + ... + 144945210.

It is an arithmetic number, because the mean of its divisors is an integer number (6522522345).

Almost surely, 2^78270267870 is an apocalyptic number.

78270267870 is an abundant number, since it is smaller than the sum of its proper divisors (130450447170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78270267870 is a wasteful number, since it uses less digits than its factorization.

78270267870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289889897 (or 289889891 counting only the distinct ones).

The product of its (nonzero) digits is 3687936, while the sum is 54.

The spelling of 78270267870 in words is "seventy-eight billion, two hundred seventy million, two hundred sixty-seven thousand, eight hundred seventy".